Products    EW1A module

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Description

The EW1A module is the first realization of the EJC concept. The EW1A is a complete, easy to integrate single board computer in SO-DIMM size. The EW1A does not require any external parts.

The system is based on a high performance 32-bit ARM7 processor running at 24 MHz. It has 8 MBytes of flash and 8 MBytes of DRAM. Onboard interfaces like Ethernet, RS232, RS485, I2C, digital I/O, or local LCD display, and the ISA-style expansion bus, make this module ready for interconnection to a variety of devices, systems, or equipment.

By means of the I2C interface, the functionality of the EW1A can be expanded on chip level. Devices are available for digital I/O, analogue I/O, temperature monitoring, keyboard, LCD, and storage, among others. The ISA-style bus, available on the DIMM connector, can be used to expand the system with external hardware like a standard IDE hard disk, I/O bus controller, VGA controller, or additional memory.

Block diagram

Specification highlights

CPU	SHARP LH77790B, 32-bit ARM7DI RISC core
Clock speed	24 MHz
Memory, onboard	8 MBytes DRAM 8 MBytes NOR FLASH 2 KBytes I2C EEPROM
Interfaces (all available on DIMM connector)	LCD interface Ethernet 10BASE-T 1x Serial RS232, full modem signals 1x Serial TTL, limited modem signals 1x Serial RS485 I2C master interface 8x digital inputs 8x digital outputs ISA-style expansion bus
LCD controller	Direct connection to LCD STN panels Monochrome, 2 bpp greyscale, or 3 bpp RGB modes. Resolution up to 2048x1024 pixels (depends on screen mode)
Additional onboard peripherals	I2C temperature sensor Watchdog
Power	+5V / 500 mA
Dimensions	SO-DIMM 144 pins 67.61 x 50 mm (2.662" x 1.969")
Environmental	0 .. 70°C Humidity 95%, non-condensing